918results about How to "Reduce power generation costs" patented technology

The present invention provides a electrical power system short-term load forecasting method based on a big data technology. The user-level load forecasting is realized by utilizing a data mining technology, and user-level loads are accumulated to form a system load. The electrical power system short-term load forecasting method comprises the steps of: conducting load curve clustering analysis, and classifying load curves with similar shape features into a class; determining key influence factors, and achieving the purposes of reducing classifying rules and simplifying a forecasting model; establishing classifying rules, and adopting a CART decision tree algorithm to obtain condensation level clustering analysis results; classifying days to be forecast; training the forecasting model and forecasting, and selecting a corresponding support vector machine model to complete the forecasting according to the obtained classification results of the days to be forecast; and completing the step of calculating the system load on a Hadoop big data calculating platform. The electrical power system short-term load forecasting method based on the big data technology studies a user-level load forecasting framework, discovers electricity utilization behavior rules of a user by utilizing the data mining technology, and increases the precision of load forecasting.

The invention provides a method of solving a robust two-layer optimization model based on wind power prediction and demand response. The robust two-layer optimization model comprises a unit combination optimization model and an economic dispatching optimization model. The method comprises steps: the unit combination optimization model is built; according to the unit combination optimization model, the economic dispatching optimization model is built; and according to the economic dispatching optimization model, the robust two-layer optimization model is built and solved. The robust two-layer optimization model provided by the invention comprises the unit combination optimization part and the economic dispatching optimization part, and considered from two aspects of a power generation side and a demand side, the method of the invention improves the wind power absorption level and solves the problem of uncertainty of wind power output.

The invention provides a low-cost solar energy tracking and condensing power generation method, belongs to the field of solar utilization, relates to solar energy condensing light and heat power generation and condensing photovoltaic power generation and solar energy condensing light and heat utilization, and realizes a whole low-cost proposal for solar energy power generation through technical breakthroughs in various links. The method comprises that: a parallel linkage and a compensation mechanism control a reflecting mirror array to trace and condense light in low cost; heat induction of a power thermotube of an inverted valve is added to a thermotube cycle for evaporation and condensation; container type heat evaporation and pressurization replaces a feed pump to make a heat power generation cycle freely select working media for high-efficiency fully-enclosed operation; and a simple linear motor type hydrothermomagnetic power generation method can make the heat pressurization power generation cycle have higher efficiency and lower cost, make thermotubes on solar cell backboards radiate heat, condense light, generate power and the like. The low-cost whole resolution proposal can promote wide use of solar energy, and the technical breakthroughs in the various links can play important roles in saving energy in respective fields.

A tandem photovoltaic device and a method for fabricating the photovoltaic device is disclosed. The tandem photovoltaic device comprises two or more photovoltaic layers laminated to each other, each of which including a semiconductor electrode, an electrolyte layer and a counter electrode. A counter electrode of the upper photovoltaic layer is patterned in a grid shape so as to include a plurality of light-transmitting portions, which permit transmission of light to the lower photovoltaic layer. The tandem photovoltaic device has the advantages of high power conversion efficiency and degree of integration. Advantageously, the tandem photovoltaic device can reduce electric power generation costs.

The invention discloses a method for manufacturing a high efficient two-sided N-shaped crystalline silicon solar cell based on silk-screen printing technique. The preparation steps are: carrying out frontal phosphorous diffusion or partial phosphorous diffusion on the N-shaped silicon chip, growing a passivation layer and an antireflection layer, manufacturing a frontal electrode, carrying out back boron diffusion on the N-shaped silicon chip, growing a passivation layer and an antireflection layer, and manufacturing a back electrode. The inventive method has simple manufacturing technique, low cost, small investment on equipment and high production efficiency, and most part of the manufacturing technique can be carried out on a common conventional cell production line.

The invention relates to a coordinative optimization unit combination method of energy. The energy comprises wind power, thermal power and pumped storage energy. The coordinative optimization unit combination method of the energy includes following steps: confirming a wind power output confidence interval; confirming running parameters and coal consumption characteristics of a thermal power generating unit and running parameters and running characteristics of a pumped energy storage unit; confirming combination object functions and constraint conditions of a wind power, thermal power and pumped storage energy joint optimization unit; confirming mixed integer nonlinear programming problems; confirming a starting and stopping plan of the wind power, thermal power and pumped storage energy joint optimization unit in future 24 hours. The coordinative optimization unit combination method of the energy improves unit combination reliability, guarantees that a system has enough regulation ability in real-time running so as to balance power imbalance caused by power fluctuation of wind, promotes consumption and absorption of the wind power, achieves coordinative optimization running of the multivariate energy, and thereby guarantees safety and economical efficiency of running of a power grid.

The invention discloses a photovoltaic power generation device with a global maximum power output function, which comprises a photovoltaic cell array and a main converter, wherein the photovoltaic cell array comprises a plurality of series photovoltaic cells. The photovoltaic power generation device also comprises a power adjustment array and an auxiliary converter, wherein an input end of the auxiliary converter is connected with a direct current bus of the photovoltaic cell array, and the power adjustment array comprises power adjustment units corresponding to the photovoltaic cells one by one; and the power adjustment units are connected with the corresponding photovoltaic cells in parallel, and input ends of the power adjustment units are connected with an output end of the auxiliary converter. The photovoltaic power generation device has the advantages that the structure is simple, the cost is low, and the reduced output current under partial shade conditions can be automatically compensated to realize the maximum power output of a single photovoltaic cell.

The invention discloses a complementary power supply system of movable wind generation, solar generation and vehicle starting/generation, comprising a loading vehicle, a wind generating unit, a solar cell array, a storage system (super capacitor), a vehicle starting/generator and a power square cavity. The generating system is flexible to move and convenient to stretch, is particularly suitable for being applied to departments with long-term field mobile operation and can fully utilize renewable energy sources to reduce the dependence on fuel as much as possible, and provides electric power safeguard of the field operation.

The invention relates to a photovoltaic solar energy pavement structure unit, a power generation system and a manufacturing method of the pavement structure unit. The pavement structure unit comprises a concrete base, a photovoltaic solar cell panel and a PMMA light-transmitting protective plate, a sinking part is arranged in the center of the concrete base, the PMMA light-transmitting protective plate is arranged on the concrete base in a covering mode to define a closed space, and the photovoltaic solar cell panel is packaged in the closed space. The power generation system comprises a solar energy storage battery controller, a storage battery and multiple photovoltaic solar energy pavement structure units, the photovoltaic solar energy pavement structure units are laid to form a pavement and connected in parallel or series to the solar energy storage battery controller, the solar energy storage battery controller is connected with the storage battery, and the output end of the storage battery or the output end of the solar energy storage battery controller is connected with an electric load. The manufacturing method includes the steps that S1, the concrete base is prefabricated; S2, the photovoltaic solar cell panel is installed; S3, the PMMA light-transmitting protective plate is arranged on the concrete base in a packaging mode and receives penetrating light irradiation.

According to the present invention, a control apparatus for an electric generator includes a power generation cost determiner determining a power generation cost of the generator, a threshold determiner determining a threshold of power generation cost as a function of a state of charge of an electric energy storage device, a comparator comparing the power generation cost of the generator with the threshold, and a controller. When the power generation cost of the generator is lower than the threshold, the controller controls the generator to generate an increased amount of electric power, so as to both charge the electric energy storage device and feed an electrical load. Otherwise, when the power generation cost of the generator is higher than the threshold, the controller controls the generator to generate a decreased amount of electric power, so as to allow the electric energy storage device to discharge to feed the electrical load.

The invention relates to a recycling and purification method of a silicon cutting waste material and belongs to the technical field of secondary resource circulation utilization of silicon materials.The recycling and purification method comprises the following steps: carrying out solid-liquid separation on silicon waste slurry in a silicon ingot cutting process, and drying to obtain a solid-statesilicon waste material; uniformly mixing CaO, SiO2 and a fluxing agent to obtain a slag-making agent; uniformly mixing the slag-making agent and the solid-state silicon waste material; putting a mixture into a medium frequency induction furnace; vacuumizing and then introducing argon gas; heating to 1450 to 1700 DEG C under an argon gas atmosphere condition and smelting at constant temperature for 0.5 to 4h; cooling along a furnace to obtain a fused block; separating silicon dreg of the fused block by adopting a diamond line cutting method to obtain high-purity silicon. According to the recycling and purification method, a silicon cutting waste material is subjected to slag-making and refining treatment of an induction furnace; separation and purification are carried out in the same operation step, and comprehensive recycling and purification treatment of a silicon-containing waste material in a silicon ingot cutting process is realized; the recycling and purification method has the characteristics of great production capability and high comprehensive recycling rate; wastes are changed into valuable things; the solar power generation cost can be reduced and a solar energy technology is easy to popularize.

The invention relates to a device and method for fire coal management and combustion strategy optimization. At present, a device and method for fire coal management and combustion strategy optimization do not exist, wherein the device and method for fire coal management and combustion strategy optimization can effectively solve the safety problem caused by variable coal quality conditions to a unit. The device for fire coal management and combustion strategy optimization is characterized by comprising a coal quality on-line analysis device, a communication interface, a local monitoring device, a network optical fiber, a first real-time database interface, a real-time database server, a second real-time database interface and a fire coal management and combustion strategy optimization system server, wherein the coal quality on-line analysis device has the function of real-time and on-line measurement on the ash content, the moisture content and the heat quantity of coal, the coal quality on-line analysis device is connected with the local monitoring device through the communication interface, the local monitoring device is connected with the first real-time database interface, and the real-time database server is connected with the fire coal management and combustion strategy optimization system server. The device and method for fire coal management and combustion strategy optimization effectively solve the problem that economy and safety of the unit are reduced due to the fact that the running adjustment mode is poor when coal quality is variable.

The invention discloses a distributed economic dispatch and coordination control method for a micro-grid system, and belongs to the technical field of distributed generation. The distributed economic dispatch and coordination control method comprises the steps that m loads are controlled by n distributed power sources; the first distributed power source is used as a master control unit, the V/f control method is adopted for control, the master control unit is made to supply voltage and frequency references to the other distributed power sources in a micro-grid, and fluctuations of output power and loads of the other distributed power sources are tracked through charging and discharging control; the other distributed power sources are controlled by the PQ control method, provide output power for the micro-grid, and are responsible for power dispatch of the micro-grid; the distributed economic dispatch algorithm is used for calculating output results of the optimum active power of all the distributed power sources. The distributed economic dispatch and coordination control method is used for controlling and coordinating the micro-grid system, so that the generation cost of the system is greatly reduced, system communication traffic is reduced, and system running reliability is ensured.

The invention discloses an integrated tower solar thermal power generation unit employing quicksand to store and transfer heat, and a tower solar thermal power generation unit built by 'quicksand' instead of conduction oil, fused salt or gas and the like to transfer and store heat. The device adopts fluid characteristics of the 'quicksand', and has the characteristics of thermostability, zero pressure, small thermal resistance and low cost of the 'quicksand'; and superheated steam is generated by sensibile heat and high-temperature air carried by the quicksand when flowing through a vapor generator to push a steam turbine generator to generate electricity, therefore, the construction cost of a tower solar thermal power generation unit is reduced by integral design, and a technological base is established for final implementation of parity power generation. The device belongs to the technical field of solar thermal electric power generation.

The invention relates to a chain-transmitting-scrubbing-brush type device for automatically cleaning solar panels. The device comprises a support fixed on a base, the front portion of the support is low, the back portion of the support is high, two guide rails are respectively and transversely fixed on the support, and the solar panels are fixed on the support in parallel. The device is characterized in that a cleaning device installed perpendicular to the guide rails is arranged, and the upper end and the lower end of the cleaning device are connected with the guide rails through wheels. A motor and a controller are arranged at the ends of the cleaning device, a chain is connected with the output end of the motor through an idler wheel, and scrubbing brushes installed at equal interval are fixed on the chain and are in close contact with panel faces of the solar panels. The two ends of the guide rails are provided with limiting switches respectively. The chain-transmitting-scrubbing-brush type device for automatically cleaning the solar panels is convenient to use, practical, safe and stable, and has the advantages of being practical in function, good in controllability, high in automatic degree and low in energy consumption, improving the generating efficiency and reducing the generating cost.

The invention belongs to the technical field of high-polymer composite materials, and relates to a thermoplastic polyester/polyethylene composition and application thereof. The thermoplastic polyester/polyethylene composition is prepared from the following components in parts by weight: 20-80 parts of thermoplastic polyester, 20-80 parts of polyethylene, 2-20 parts of solubilizer and 0.1-2 parts of antioxidant, wherein the sum of the thermoplastic polyester and polyethylene is 100 parts. The obtained thermoplastic polyester/polyethylene composition is a uniform-phase composite material, and has favorable properties of the thermoplastic polyester and polyethylene. The polyester/polyethylene alloy material prepared from the thermoplastic polyester/polyethylene composition has the inherent advantages of the PBT (polybutylene terephthalate) and PE (polyethylene), thereby greatly improving the properties of the alloy material and greatly enhancing the dimensional stability and tensile property of the alloy film material; and thus, the alloy material has the advantages of high-temperature resistance, ultraviolet resistance, weather resistance, hydrolysis resistance, low production cost and the like.

The invention provides an ingot casting method for single polysilicon of 800kg. The method comprises the steps of: step 1, selecting a square monocrystalline silicon wafer of 156*156mm in size and 1-50mm in thickness and laying it tightly and uniformly at a crucible bottom with an external dimension of 1050*1050mm; step 2, adding a primary polysilicon material and an alloy matching with the target resistivity to the square monocrystalline silicon wafer, and at least 800kg of materials are charged altogether; step 3, conducting vacuum pumping and leak detection; step, carrying out heating; step 5, implementing melting; step 6, performing crystal growth: after 30min of insulation, opening an insulating cage to a degree of 8cm and controlling the fall of temperature to 1436DEG C within one hour, then opening the insulating cage to a degree of 10cm, with the temperature maintained at 1436DEG C; step 7, conducting annealing. The single polysilicon ingot prepared with the method of the invention contains a majority of monocrystalline silicon and little polycrystalline silicon. Able to casting a single polysilicon ingot over 800kg at one time, the casting method provided in the invention greatly improves the production efficiency.

The invention discloses a design method of a solar energy uniform light superposition reflective condenser, wherein a light receiving surface is a photocell plate or a circular heat collection pipe. The design method is characterized in that a condensing lens consists of a limited number of flat plate reflection mirrors and broken line-shaped reflection mirror slot frames and is placed on a solartracking frame, a precise calculation formula of the width and the position of a space coordinate of each reflection mirror and the detailed steps of the geometric mapping method are deduced accordingto the constraint condition that two parallel light rays reflected by two end points of a line segment of a cross section of each reflection mirror respectively fall on two end points of a line segment of the cross section of the photocell plate or are respectively tangent with the circumference of the cross section of the circular heat collection pipe and the normal line of a mirror surface of the reflection mirror is an angle bisector of an included angle between incident light and reflected light, thereby ensuring that the reflected light of each flat plate reflection mirror is uniformly superposed on the light receiving surface, leading the single-chip output features of the photocell to be consistent, improving the light-emitting efficiency of components, leading the processing of the condenser to be easy and reducing the cost. The calculation formula can be used for optimizing the tilt angle and the nominal focal length of the photocell plate.

The invention discloses a floating-type wind energy and wave energy combined power generating system which comprises a wind power generating system and a plurality of oscillating water column type wave energy power generating devices of the same structure. As for the wind power generating system, the upper end of a tower tube is connected with a wind power generating unit, a plurality of buoys ofthe same structure are mounted at the lower end of the tower tube through a truss structure to serve as the oscillating water column type wave energy power generating devices, and each buoy is provided with a wave inlet, an air chamber and an air outlet sequentially from bottom to top; an air turbine power generator is mounted at each air outlet; and waves enter the buoys through the wave inlets to drive the air turbine power generators to generate power. The floating-type wind energy and wave energy combined power generating system is simple in structure, convenient to mount and construct, low in cost and wide in applicable water depth range; wind power generating and wave energy power generating are completed on the same supporting structure and shares a supporting platform and a power transmission mating system, and thus the power generating cost is lowered; and the wave energy power generating device adjusts platform damping, thus the motion stability of the system is improved advantageously, and the floating-type wind energy and wave energy combined power generating system is a reliable offshore renewable energy source power generating platform.

The invention relates to a full-distributed secondary frequency modulation method for a power system microgrid, and belongs to the technical field of power system operation and control. In the method, firstly, the power generation cost functions of a traditional energy distributed power supply and a renewable energy distributed power supply are designed, and the tiny-increasing rates of the traditional energy distributed power supply and the renewable energy distributed power supply are obtained by derivation. A distributed data acquisition and information interaction structure is provided, a subgradient-based consistency algorithm is adopted, and according to data collected by the distributed power supplies and exchanged information, an output power adjustment amount is obtained by iterative computation so as to carry out real-time control of the output power of the distributed power supplies. According to the full-distributed secondary frequency modulation method, power generation cost is guaranteed to be lowest in a secondary frequency modulation process while the frequency realizes quick recovery, and power is reasonably distributed between the distributed power supplies. According to the control method, the frequency oscillation of the microgrid can be avoided, the full-distributed secondary frequency modulation of the microgrid can be realized, and microgrid operation economy is improved.

The invention particularly relates to a wind energy and groove-type solar all-in-one power generating system which aims to solve the problems that due to the fact that all wind energy is converted into heat energy, energy waste is caused, the cost of an energy storage device is increased, and waste of wind electricity is caused in the prior art. According to the wind energy and groove-type solar all-in-one power generating system, wind energy and solar energy serve as electricity generation sources of the wind energy and groove-type solar all-in-one power generating system, unstable high-frequency electricity energy of wind electricity is converted into heat energy to be stored through a heating device, the wind electricity and solar energy heat generation electricity are united and stably output through power generation adjustment of a turbine, and therefore requirements of a power grid are met. A groove-type solar energy collector is used for collecting solar energy, a heat collection working medium is heated to reach a certain temperature, and heat energy is transferred to a working medium which acts in a cyclic mode in a power loop through a preheater, a vapor generator and a superheating reheater, or high-temperature high-pressure superheated steam is generated to drives the turbine and then drive a generator to generate electricity. The wind energy and groove-type solar all-in-one power generating system is suitable for the power field.